A few days ago I posted about the Tenmile scope on a 7RM skinny barrel. Story on that, the previous owner hated it, kicks too much, I traded him a 788 in 308 straight up. Installed Ti Pro 3 ST on it. Tamed that skinny barrel. No shoulder on the barrel, just snugged up and Red Locktite.
When I got the rifle I came up with a load that is fairly mild 2944 with 140 VLDH, 66 grains of 4831SC, Hornady, 9-1/2 primers.
These were the pictures I posted on the Tenmile thread. Factory ammo to get the scope in the midlle, then went to the smaller diamond on L with handloads. Cranked the scope for center fired 1 on next small diamond to the R, then again on the diamond to its R again. 3 shot composite looks good
Yesterday I went to the range to do a initial testing with last year's acquisition of 168 JLK VLDs and newly sourced N560. Still stuck to my very old good lot of 9-1/2 primers to pressure test as they did very well with the 140 VLDHs.
Ejector swipes at 4&5. Bolt lift was fine. Don't try these loads as they most likely too hot for your rig. QL tags them in the danger zone.
Got sidetracked when loading the truck, I forgot the LabRadar. Chrono data will follow when I take it for a fun day with Shotmarker at 500 yards.
First shot was extremely high from the old 140 VLDH load POI. See lone shot. Cranked down for middle. I like single axis sight movement when testing. Straight line looks promising.
Fired the rounds. The picture tells the tale. Based on the elevation dispersion I will probably pick 69.75 and run with fine tuning the load at 500 yards, my self imposed limit with this combo.
Bottom line, the skinny barreled ADL with just a brake added is performing above its pay grade. Sending the bolt to have the primary extraction fine tuned and bolt handle TIG welded. I even bought a fluted Krieger with intent to rebarrel on case the factory barrel is no bueno. Well, not now. The factory barrel stays.